The Byte Brothers CTX200 Coax Cable Tester tests both RJ45 CAT5/6 Ethernet cables and coaxial cables giving pass/fail results in just one second. This professional grade pocket voice and video cable tester tests for opens/shorts, reversals, split pairs as well as continuity. The CTX200 is a cost effect must have tool for any professional installer in the areas of networking, cabling, home theater, audio video, or surveillance system installations.